package com.spring.picture.service.impl;

import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.spring.picture.exception.BusinessException;
import com.spring.picture.exception.ErrorCode;
import com.spring.picture.exception.ThrowUtils;
import com.spring.picture.manager.auth.StpKit;
import com.spring.picture.model.dto.user.UserQueryRequest;
import com.spring.picture.model.entity.User;
import com.spring.picture.model.enums.UserRoleEnum;
import com.spring.picture.model.vo.user.LoginUserVO;
import com.spring.picture.model.vo.user.UserVO;
import com.spring.picture.service.UserService;
import com.spring.picture.mapper.UserMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

import static com.spring.picture.constant.UserConstant.USER_LOGIN_STATE;

/**
* @author 朱鹏霖
* @description 针对表【user(用户)】的数据库操作Service实现
* @createDate 2025-03-19 14:34:55
*/
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService {

    /**
     * 用户注册一
     * @param userAccount 用户账号
     * @param userPassword 用户密码
     * @param checkPassword 校验密码
     * @return
     */
    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        // 1.校验
        if (StrUtil.hasBlank(userAccount,userPassword,checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户账号过短");
        }
        if (userPassword.length() < 8 || checkPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户密码过短");
        }
        if (userPassword.length() > 16 || checkPassword.length() > 16) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"用户密码过长");
        }
        if (!userPassword.equals(checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"两次输入的密码不一致");
        }

        // 2.检查账号是否已经存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount",userAccount);
        long count = this.baseMapper.selectCount(queryWrapper);
        if (count > 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"账号已存在");
        }

        // 3.加密
        String encryptPassword = getEncryptPassword(userPassword);

        // 4.插入数据
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName("这个玩家太懒了，还没有起名字呦");
        user.setUserRole(UserRoleEnum.USER.getValue());
        user.setCreateTime(new Date());
        user.setUpdateTime(new Date());
        boolean result = this.save(user);
        if (!result) {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR,"注册失败，数据库错误");
        }
        return user.getId();
    }

    /**
     * 用户注册二
     * @param userAccount 用户账号
     * @param userPassword 用户密码
     * @param checkPassword 校验密码
     * @param email 用户邮箱
     * @param checkCode 验证码
     * @return
     */
    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    @Override
    public long userMailRegister(String userAccount, String userPassword, String checkPassword, String email, String checkCode) {
        String code = redisTemplate.opsForValue().get(email);
        ThrowUtils.throwIf(!Objects.equals(code, checkCode),ErrorCode.PARAMS_ERROR);
        return userRegister(userAccount,userPassword,checkPassword);
    }

    /**
     * 密码加密
     * @param userPassword
     * @return
     */
    @Override
    public String getEncryptPassword(String userPassword){
        //加盐，混淆密码
        final String SALT = "zpl";
        return DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
    }

    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        // 1. 校验
        if (StrUtil.hasBlank(userAccount, userPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "账号错误");
        }
        if (userPassword.length() < 8 || userPassword.length() > 16) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "密码错误");
        }
        // 2. 加密
        String encryptPassword = getEncryptPassword(userPassword);
        // 查询用户是否存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword", encryptPassword);
        User user = this.baseMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            log.info("user login failed, userAccount cannot match userPassword");
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户不存在或密码错误");
        }
        // 3. 记录用户的登录态
        request.getSession().setAttribute(USER_LOGIN_STATE, user);
        // 4.记录用户登录态到Sa-token，便于空间鉴权时使用，注意保证该用户信息与SpringSession中的信息过期时间一致
        StpKit.SPACE.login(user.getId());
        StpKit.SPACE.getSession().set(USER_LOGIN_STATE, user);

        return getLoginUserVO(user);
    }

    @Override
    public User getLoginUser(HttpServletRequest request) {
        // 判断是否已经登录
        Object object = request.getSession().getAttribute(USER_LOGIN_STATE);
        User currentUser = (User) object;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 重新从数据库中查询该用户，防止用户信息发生改变
        Long userId = currentUser.getId();
        currentUser = this.getById(userId);
        ThrowUtils.throwIf(currentUser == null,ErrorCode.NOT_LOGIN_ERROR);

        return currentUser;
    }

    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user == null)return null;

        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtils.copyProperties(user, loginUserVO);
        return loginUserVO;
    }

    @Override
    public UserVO getUserVO(User user) {
        if (user == null) {
            return null;
        }
        UserVO userVO = new UserVO();
        BeanUtils.copyProperties(user, userVO);
        return userVO;
    }

    @Override
    public List<UserVO> getUserVOList(List<User> userList) {
        if (userList.isEmpty()) {
            return new ArrayList<>();
        }
        return userList.stream()
                .map(this::getUserVO)
                .collect(Collectors.toList());
    }


    @Override
    public boolean userLogout(HttpServletRequest request) {
        // 先判断是否已经登录
        Object user = request.getSession().getAttribute(USER_LOGIN_STATE);
        if (user == null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR,"未登录");
        }

        // 移除登录状态
        request.getSession().removeAttribute(USER_LOGIN_STATE);
        return true;
    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }

        Long id = userQueryRequest.getId();
        ThrowUtils.throwIf(ObjUtil.isNotNull(id) && id <= 0,ErrorCode.PARAMS_ERROR);

        String userAccount = userQueryRequest.getUserAccount();
        String userName = userQueryRequest.getUserName();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(ObjUtil.isNotNull(id), "id", id);
        queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
        queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
        queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }

    @Override
    public boolean isAdmin(User user) {
        return user != null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }

}




